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Three Dimensional Velocity Field Underneath a Breaking Rogue Wave

[+] Author Affiliations
Alberto Alberello, Filippo Nelli

Swinburne University of Technology, Hawthorn, Australia

Csaba Pakodzi

MARINTEK, Trondheim, Norway

Elzbieta M. Bitner-Gregersen

DNV GL AS, Høvik, Norway

Alessandro Toffoli

University of Melbourne, Parkville, Australia

Paper No. OMAE2017-61237, pp. V03AT02A009; 9 pages
  • ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 3A: Structures, Safety and Reliability
  • Trondheim, Norway, June 25–30, 2017
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5765-6
  • Copyright © 2017 by ASME


Wave breaking has large impact on stresses and loading on marine structures, but it is not yet accounted for in the design process. A numerical investigation is here presented to fully assess the three-dimensional velocity field underneath a breaking wave. The breaking onset is achieved by modulating an initial monochromatic wave with infinitesimal sideband perturbations. The latter triggers a nonlinear energy transfer, which allows one individual waves to grow and break once the steepness has overcome a specific threshold. Numerical simulations of the Navier-Stokes equations are carried out by means of the open source CFD code OpenFOAM. To speed up the simulation process, the nonlinear evolution of the perturbed Stokes wave is first obtained with a High-Order Spectral Method (HOSM) until the onset of breaking; surface elevation and velocity field are then transferred to the CFD for the final stage of the breaking process. The fully three-dimensional turbulent kinematic field is presented and discussed with reference to the velocity field predicted by the theory.

Copyright © 2017 by ASME
Topics: Waves



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